Fall Under the Spell of Denver's Top Rated Historic Bed & Breakfast Inn Castle Marne Bed & Breakfast is an historic Denver, Colorado castle in the heart of Denver's City Park and Capitol Hill neighborhoods. Castle Marne features 9 beautiful rooms decorated in the Victorian style with modern conveniences such as private outdoor hot tubs and Denver Mattress Co mattresses. The 1889 Denver castle is a unique location for intimate wedding ceremonies and receptions and is recognized as the most welcoming B&B inn by TripAdvisor, BedandBreakfast.com and Conde Nast Johansens